I remember a while back Ubisoft said they had implemented that if you guardbreak at the same time, both players get pushed backwards. However, this rarely happens. 90% of the time, the other person will win the GB against me if we GB at the same time. I have recorded gameplay in several cases where my character is doing the animation to guardbreak and gets guardbroken. Even if it's the beginning of the GB, just started to do the arm swipe animation, I'll still get GB against me. If the other person is doing a GB, then I do a GB, that's when the knockback of both players will occur, I can't GB someone if they're already doing a GB, but it happens to me all the time. :confused:

I have talked to others where it happens to others as well. They'll just straight out lose the GB while GB'ing. Very rare double GB knockback mechanic will occur.